diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
index b1c41b0d97..db3570d96f 100644
--- a/toolchain/toolchain-external/pkg-toolchain-external.mk
+++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
@@ -159,7 +159,7 @@ TOOLCHAIN_EXTERNAL_CFLAGS += -m64
 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_64
 endif
 ifneq ($(GCC_TARGET_ARCH),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -march=$(CC_TARGET_ARCH)
+TOOLCHAIN_EXTERNAL_CFLAGS += -march=$(GCC_TARGET_ARCH)
 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_ARCH='"$(GCC_TARGET_ARCH)"'
 endif
 ifneq ($(GCC_TARGET_CPU),)